You can classify words in your sleep

When people practice simple word classification tasks before nodding off -- knowing that a 'cat' is an animal or that 'flipu' isn't found in the dictionary, for example -- their brains will unconsciously continue to make those classifications even in sleep. The findings show that some parts of the brain behave similarly whether we are asleep or awake and pave the way for further studies on the processing capacity of our sleeping brains, the researchers say.

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